Toilet seat lifting device

Abstract

A toilet seat lifting device comprised of a box fastened to the toilet bowl of a toilet at the top near the back, two sliding racks made to slide in two bevel guide channels on the bottom of the box at two opposite sides, a transmission assembly driven by a slow speed motor to move the sliding racks up and down along the guide channels, and a toilet seat covered on a toilet bowl and having a rear end pivotably connected between the sliding racks, whereby the toilet seat is lifted and lowered between a horizontal position and a bevel position to help the user sit on the toilet seat or stand up from the toilet seat as the slow speed motor is controlled to move the sliding racks forward and backward alternatively.

What is claimed is: 
     
       1. A toilet seat lifting device comprising: a box adapted to be on a top surface of a installed toilet bowl of a toilet, said box comprising a front wall, a rear wall, two trapezoidal side walls bilaterally connected between said front and rear walls, a bottom wall adapted to be fastened to the top surface of the toilet bowl, a front locating plate connected to the front wall and adapted to be hooked to the toilet bowl for securing said box to the toilet, two guide channels respectively formed on each of said trapezoidal side walls and disposed on opposite sides of the toilet bowl;   a transmission assembly fastened inside said box, said transmission assembly comprised of a slow speed motor having an output shaft, a worm mounted around the output shaft of said slow speed motor, a transmission shaft having opposite ends rotatably mounted within said box, a worm gear mounted around said transmission shaft and meshed with said worm, a driven gear mounted on each of said opposite ends of said transmission shaft, two driven shafts each fastened respectively to a respective axle bearing on each of said side walls of said box, two reducing gears each mounted respectively said driven shafts and meshed with each of said driven gears on each of respectively;   two sliding racks having first and second ends wherein said second end is proximate the top surface of the toilet and made to slide in said guide channels, respectively, said sliding racks being respectively meshed with said reducing gears, each sliding rack having a pin hole near said second end;   a toilet seat having rear and front ends adapted to be mounted on the top surface of the toilet bowl, said toilet seat comprising an axle transversely disposed at a rear end thereof, said axle having pins aligned on opposite ends thereof and inserted in said pin hole on each of said sliding racks, respectively; and   a control switch connected to said slow speed motor controlled by the user to turn on said slow speed motor and control its revolving direction;   whereby turning on said slow speed motor in one direction causes said sliding racks to be obliquely moved upward along said guide channels in lifting said toilet seat from a horizontal position in which said rear and front ends are adapted to be supported on the top surface of the toilet bowl to a bevel position wherein said front end is adapted to be slidingly supported on the top surface of the toilet bowl for supporting a user's hip; turning on said slow speed motor in the reversed direction causes said sliding racks to be obliquely moved downward along said guide channels in lowering said toilet seat from said bevel position to said horizontal position so as to help a user sit on the toilet bowl.   
     
     
       2. The toilet seat lifting device of claim 1 wherein said toilet seat is covered with a toilet seat lid, said toilet seat lid having a L-shaped rear end hinged to said box above said locating plate.